tree
get_tinfo_decl (tree type)
{
tree name;
tree d;
if (COMPLETE_TYPE_P (type)
&& TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST)
{
error ("cannot create type information for type %qT because "
"its size is variable",
type);
return error_mark_node;
}
if (TREE_CODE (type) == METHOD_TYPE)
type = build_function_type (TREE_TYPE (type),
TREE_CHAIN (TYPE_ARG_TYPES (type)));
/* For a class type, the variable is cached in the type node
itself. */
if (CLASS_TYPE_P (type))
{
d = CLASSTYPE_TYPEINFO_VAR (TYPE_MAIN_VARIANT (type));
if (d)
return d;
}
name = mangle_typeinfo_for_type (type);
d = IDENTIFIER_GLOBAL_VALUE (name);
if (!d)
{
tree var_desc = get_pseudo_ti_desc (type);
d = build_lang_decl (VAR_DECL, name, TINFO_PSEUDO_TYPE (var_desc));
SET_DECL_ASSEMBLER_NAME (d, name);
/* Remember the type it is for. */
TREE_TYPE (name) = type;
DECL_TINFO_P (d) = 1;
DECL_ARTIFICIAL (d) = 1;
#ifdef KEY /* g++ does not actually ignore it (note push operation below),
so we cannot either */
if (!flag_spin_file)
#endif
DECL_IGNORED_P (d) = 1;
TREE_READONLY (d) = 1;
TREE_STATIC (d) = 1;
/* Mark the variable as undefined -- but remember that we can
define it later if we need to do so. */
DECL_EXTERNAL (d) = 1;
DECL_NOT_REALLY_EXTERN (d) = 1;
if (CLASS_TYPE_P (type))
CLASSTYPE_TYPEINFO_VAR (TYPE_MAIN_VARIANT (type)) = d;
set_linkage_according_to_type (type, d);
pushdecl_top_level_and_finish (d, NULL_TREE);
/* Add decl to the global array of tinfo decls. */
VEC_safe_push (tree, unemitted_tinfo_decls, d);
}
static tree
create_pseudo_type_info (const char *real_name, int ident, ...)
{
tree pseudo_type;
char *pseudo_name;
tree fields;
tree field_decl;
tree result;
va_list ap;
va_start (ap, ident);
/* Generate the pseudo type name. */
pseudo_name = alloca (strlen (real_name) + 30);
strcpy (pseudo_name, real_name);
strcat (pseudo_name, "_pseudo");
if (ident)
sprintf (pseudo_name + strlen (pseudo_name), "%d", ident);
/* First field is the pseudo type_info base class. */
fields = build_decl (FIELD_DECL, NULL_TREE, ti_desc_type_node);
/* Now add the derived fields. */
while ((field_decl = va_arg (ap, tree)))
{
TREE_CHAIN (field_decl) = fields;
fields = field_decl;
}
/* Create the pseudo type. */
pseudo_type = make_aggr_type (RECORD_TYPE);
finish_builtin_struct (pseudo_type, pseudo_name, fields, NULL_TREE);
CLASSTYPE_AS_BASE (pseudo_type) = pseudo_type;
result = tree_cons (NULL_TREE, NULL_TREE, NULL_TREE);
TINFO_REAL_NAME (result) = get_identifier (real_name);
TINFO_PSEUDO_TYPE (result) =
cp_build_qualified_type (pseudo_type, TYPE_QUAL_CONST);
va_end (ap);
return result;
}
